// Copyright 2014 PDFium Authors. All rights reserved. | |
// Use of this source code is governed by a BSD-style license that can be | |
// found in the LICENSE file. | |
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com | |
// Original code is licensed as follows: | |
/* | |
* Copyright 2007 ZXing authors | |
* | |
* Licensed under the Apache License, Version 2.0 (the "License"); | |
* you may not use this file except in compliance with the License. | |
* You may obtain a copy of the License at | |
* | |
* http://www.apache.org/licenses/LICENSE-2.0 | |
* | |
* Unless required by applicable law or agreed to in writing, software | |
* distributed under the License is distributed on an "AS IS" BASIS, | |
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
* See the License for the specific language governing permissions and | |
* limitations under the License. | |
*/ | |
#include "xfa/src/fxbarcode/barcode.h" | |
#include "BC_CommonPerspectiveTransform.h" | |
CBC_CommonPerspectiveTransform::CBC_CommonPerspectiveTransform(FX_FLOAT a11, | |
FX_FLOAT a21, | |
FX_FLOAT a31, | |
FX_FLOAT a12, | |
FX_FLOAT a22, | |
FX_FLOAT a32, | |
FX_FLOAT a13, | |
FX_FLOAT a23, | |
FX_FLOAT a33) | |
: m_a11(a11), | |
m_a12(a12), | |
m_a13(a13), | |
m_a21(a21), | |
m_a22(a22), | |
m_a23(a23), | |
m_a31(a31), | |
m_a32(a32), | |
m_a33(a33) { | |
} | |
CBC_CommonPerspectiveTransform::~CBC_CommonPerspectiveTransform() {} | |
CBC_CommonPerspectiveTransform* | |
CBC_CommonPerspectiveTransform::QuadrilateralToQuadrilateral(FX_FLOAT x0, | |
FX_FLOAT y0, | |
FX_FLOAT x1, | |
FX_FLOAT y1, | |
FX_FLOAT x2, | |
FX_FLOAT y2, | |
FX_FLOAT x3, | |
FX_FLOAT y3, | |
FX_FLOAT x0p, | |
FX_FLOAT y0p, | |
FX_FLOAT x1p, | |
FX_FLOAT y1p, | |
FX_FLOAT x2p, | |
FX_FLOAT y2p, | |
FX_FLOAT x3p, | |
FX_FLOAT y3p) { | |
CBC_AutoPtr<CBC_CommonPerspectiveTransform> qToS( | |
QuadrilateralToSquare(x0, y0, x1, y1, x2, y2, x3, y3)); | |
CBC_AutoPtr<CBC_CommonPerspectiveTransform> sToQ( | |
SquareToQuadrilateral(x0p, y0p, x1p, y1p, x2p, y2p, x3p, y3p)); | |
return sToQ->Times(*(qToS.get())); | |
} | |
void CBC_CommonPerspectiveTransform::TransformPoints(CFX_FloatArray* points) { | |
int32_t max = points->GetSize(); | |
FX_FLOAT a11 = m_a11; | |
FX_FLOAT a12 = m_a12; | |
FX_FLOAT a13 = m_a13; | |
FX_FLOAT a21 = m_a21; | |
FX_FLOAT a22 = m_a22; | |
FX_FLOAT a23 = m_a23; | |
FX_FLOAT a31 = m_a31; | |
FX_FLOAT a32 = m_a32; | |
FX_FLOAT a33 = m_a33; | |
int32_t i; | |
for (i = 0; i < max; i += 2) { | |
FX_FLOAT x = (*points)[i]; | |
FX_FLOAT y = (*points)[i + 1]; | |
FX_FLOAT denominator = a13 * x + a23 * y + a33; | |
(*points)[i] = (a11 * x + a21 * y + a31) / denominator; | |
(*points)[i + 1] = (a12 * x + a22 * y + a32) / denominator; | |
} | |
} | |
CBC_CommonPerspectiveTransform* | |
CBC_CommonPerspectiveTransform::SquareToQuadrilateral(FX_FLOAT x0, | |
FX_FLOAT y0, | |
FX_FLOAT x1, | |
FX_FLOAT y1, | |
FX_FLOAT x2, | |
FX_FLOAT y2, | |
FX_FLOAT x3, | |
FX_FLOAT y3) { | |
FX_FLOAT dy2 = y3 - y2; | |
FX_FLOAT dy3 = y0 - y1 + y2 - y3; | |
if ((dy2 == 0.0f) && (dy3 == 0.0f)) { | |
return new CBC_CommonPerspectiveTransform(x1 - x0, x2 - x1, x0, y1 - y0, | |
y2 - y1, y0, 0.0f, 0.0f, 1.0f); | |
} else { | |
FX_FLOAT dx1 = x1 - x2; | |
FX_FLOAT dx2 = x3 - x2; | |
FX_FLOAT dx3 = x0 - x1 + x2 - x3; | |
FX_FLOAT dy1 = y1 - y2; | |
FX_FLOAT denominator = dx1 * dy2 - dx2 * dy1; | |
FX_FLOAT a13 = (dx3 * dy2 - dx2 * dy3) / denominator; | |
FX_FLOAT a23 = (dx1 * dy3 - dx3 * dy1) / denominator; | |
return new CBC_CommonPerspectiveTransform( | |
x1 - x0 + a13 * x1, x3 - x0 + a23 * x3, x0, y1 - y0 + a13 * y1, | |
y3 - y0 + a23 * y3, y0, a13, a23, 1.0f); | |
} | |
} | |
CBC_CommonPerspectiveTransform* | |
CBC_CommonPerspectiveTransform::QuadrilateralToSquare(FX_FLOAT x0, | |
FX_FLOAT y0, | |
FX_FLOAT x1, | |
FX_FLOAT y1, | |
FX_FLOAT x2, | |
FX_FLOAT y2, | |
FX_FLOAT x3, | |
FX_FLOAT y3) { | |
CBC_AutoPtr<CBC_CommonPerspectiveTransform> temp1( | |
SquareToQuadrilateral(x0, y0, x1, y1, x2, y2, x3, y3)); | |
return temp1->BuildAdjoint(); | |
} | |
CBC_CommonPerspectiveTransform* CBC_CommonPerspectiveTransform::BuildAdjoint() { | |
return new CBC_CommonPerspectiveTransform( | |
m_a22 * m_a33 - m_a23 * m_a32, m_a23 * m_a31 - m_a21 * m_a33, | |
m_a21 * m_a32 - m_a22 * m_a31, m_a13 * m_a32 - m_a12 * m_a33, | |
m_a11 * m_a33 - m_a13 * m_a31, m_a12 * m_a31 - m_a11 * m_a32, | |
m_a12 * m_a23 - m_a13 * m_a22, m_a13 * m_a21 - m_a11 * m_a23, | |
m_a11 * m_a22 - m_a12 * m_a21); | |
} | |
CBC_CommonPerspectiveTransform* CBC_CommonPerspectiveTransform::Times( | |
CBC_CommonPerspectiveTransform& other) { | |
return new CBC_CommonPerspectiveTransform( | |
m_a11 * other.m_a11 + m_a21 * other.m_a12 + m_a31 * other.m_a13, | |
m_a11 * other.m_a21 + m_a21 * other.m_a22 + m_a31 * other.m_a23, | |
m_a11 * other.m_a31 + m_a21 * other.m_a32 + m_a31 * other.m_a33, | |
m_a12 * other.m_a11 + m_a22 * other.m_a12 + m_a32 * other.m_a13, | |
m_a12 * other.m_a21 + m_a22 * other.m_a22 + m_a32 * other.m_a23, | |
m_a12 * other.m_a31 + m_a22 * other.m_a32 + m_a32 * other.m_a33, | |
m_a13 * other.m_a11 + m_a23 * other.m_a12 + m_a33 * other.m_a13, | |
m_a13 * other.m_a21 + m_a23 * other.m_a22 + m_a33 * other.m_a23, | |
m_a13 * other.m_a31 + m_a23 * other.m_a32 + m_a33 * other.m_a33); | |
} |